Carbon, Volume (184), No (1), Year (2021-10) , Pages (91-101)

Title : ( “Sticky” carbon coating enables high-area-capacity lithium storage of silicon-graphitic carbon hybrid )

Authors: Zidong Chen , Lun Li , Zheng Zhang , Hao Li , Bo Xie , Yungui Chen , Ali Davoodi , Saman Hosseinpour , Wei Liu ,

Citation: BibTeX | EndNote

Abstract

Pulverization and surface instability have been identified as the main impediments to the application of Si anodes in high-energy lithium-ion batteries (LIBs). In this study, a Si-graphitic carbon hybrid (SiG) is created via embedding Si nanoparticles in between expanding graphite interlayers, thus to be adopted as a model system to unravel structure-properties relations for LIBs applications. We explore the impact of artificial surface coating layers on the lithium cycling performance of SiG particles. In comparison with native SiG and carbon-coated SiG (CC-SiG), we find that the “sticky-carbon” coating, i.e., an epoxy-rich layer on top of the carbon coating, gave rise to superior cycle performance. In the “sticky carbon” coated SiG (SCC-SiG), the surface chemistry appears to have a pivotal role in both alleviating electrode disintegration and forming a favorable SEI rich in fluorine-polymers. These positive findings are examined in electrodes with mass loading ranging from 1.0 to 5.0 mg/cm2, achieving area capacities up to ∼5.0 mAh/cm2. A full cell adopting >6 mg/cm2 LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode and SCC-SiG delivers stable cycling performances. It is hence unraveled that the carbon coating layer with reactive surface groups on the top is an unrecognized key for wide range of Si-based anodes.

Keywords

, Si anode Surface moieties Solid electrolyte interface High, area capacity Lithium storage
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@article{paperid:1088193,
author = {Zidong Chen and Lun Li and Zheng Zhang and Hao Li and Bo Xie and Yungui Chen and Davoodi, Ali and Saman Hosseinpour and Wei Liu},
title = {“Sticky” carbon coating enables high-area-capacity lithium storage of silicon-graphitic carbon hybrid},
journal = {Carbon},
year = {2021},
volume = {184},
number = {1},
month = {October},
issn = {0008-6223},
pages = {91--101},
numpages = {10},
keywords = {Si anode Surface moieties Solid electrolyte interface High-area capacity Lithium storage},
}

[Download]

%0 Journal Article
%T “Sticky” carbon coating enables high-area-capacity lithium storage of silicon-graphitic carbon hybrid
%A Zidong Chen
%A Lun Li
%A Zheng Zhang
%A Hao Li
%A Bo Xie
%A Yungui Chen
%A Davoodi, Ali
%A Saman Hosseinpour
%A Wei Liu
%J Carbon
%@ 0008-6223
%D 2021

[Download]